Thanks so much to Wufoo for the support of CSS-Tricks! Wufoo is a form builder where you can quickly build forms of any complexity. From simple contact forms to multi-page logic-riddled application forms that sync to Salesforce and handle site-integrated exit surveys, it handles lots of use cases!
There is another powerful feature of Wufoo: taking payments. it's especially worth knowing about, in my opinion, because of how affordable it is. It's essentially eCommerce without costing you any fees on top of your paid Wufoo account and payment processing fees. Not to mention you can integrate them into your own site and style them however you like.